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paper-grid-list.js
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paper-grid-list.js
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/**
* @module ember-paper
*/
import { inject as service } from '@ember/service';
import { alias } from '@ember/object/computed';
import Component from '@ember/component';
import { computed } from '@ember/object';
import { run } from '@ember/runloop';
import layout from '../templates/components/paper-grid-list';
import { ParentMixin } from 'ember-composability-tools';
import gridLayout from '../utils/grid-layout';
import { invokeAction } from 'ember-invoke-action';
const mediaRegex = /(^|\s)((?:print-)|(?:[a-z]{2}-){1,2})?(\d+)(?!\S)/g;
const rowHeightRegex = /(^|\s)((?:print-)|(?:[a-z]{2}-){1,2})?(\d+(?:[a-z]{2,3}|%)?|\d+:\d+|fit)(?!\S)/g;
const unitCSS = (units) => {
return `${units.share}% - (${units.gutter} * ${units.gutterShare})`;
};
const dimensionCSS = (dimensions) => {
return `calc((${dimensions.unit}) * ${dimensions.span} + (${dimensions.span} - 1) * ${dimensions.gutter})`;
};
const media = (mediaName) => {
return ((mediaName.charAt(0) !== '(') ? (`(${mediaName})`) : mediaName);
};
const mediaListenerName = (name) => {
return `${name.replace('-', '')}Listener`;
};
const applyStyles = (el, styles) => {
for (let key in styles) {
el.style[key] = styles[key];
}
};
/**
* @class PaperGridList
* @extends Ember.Component
*/
export default Component.extend(ParentMixin, {
layout,
tagName: 'md-grid-list',
constants: service(),
tiles: alias('childComponents'),
didInsertElement() {
this._super(...arguments);
this._installMediaListener();
},
didUpdate() {
this._super(...arguments);
// Debounces until the next run loop
run.debounce(this, this.updateGrid, 0);
},
willDestroyElement() {
this._super(...arguments);
this._uninstallMediaListener();
},
// Sets up a listener for each media query
_installMediaListener() {
for (let mediaName in this.get('constants.MEDIA')) {
let query = this.get('constants.MEDIA')[mediaName] || media(mediaName);
let mediaList = window.matchMedia(query);
let listenerName = mediaListenerName(mediaName);
// Sets mediaList to a property so removeListener can access it
this.set(`${listenerName}List`, mediaList);
// Creates a function based on mediaName so that removeListener can remove it.
this.set(listenerName, run.bind(this, (result) => {
this._mediaDidChange(mediaName, result.matches);
}));
// Trigger initial grid calculations
this._mediaDidChange(mediaName, mediaList.matches);
mediaList.addListener(this[listenerName]);
}
},
_uninstallMediaListener() {
for (let mediaName in this.get('constants.MEDIA')) {
let listenerName = mediaListenerName(mediaName);
let mediaList = this.get(`${listenerName}List`);
mediaList.removeListener(this[listenerName]);
}
},
_mediaDidChange(mediaName, matches) {
this.set(mediaName, matches);
// Debounces until the next run loop
run.debounce(this, this._updateCurrentMedia, 0);
},
_updateCurrentMedia() {
let mediaPriorities = this.get('constants.MEDIA_PRIORITY');
let currentMedia = mediaPriorities.filter((mediaName) => this.get(mediaName));
this.set('currentMedia', currentMedia);
this.updateGrid();
},
// Updates styles and triggers onUpdate callbacks
updateGrid() {
applyStyles(this.element, this._gridStyle());
this.get('tiles').forEach((tile) => tile.updateTile());
invokeAction(this, 'onUpdate');
},
_gridStyle() {
this._setTileLayout();
let style = {};
let colCount = this.get('currentCols');
let gutter = this.get('currentGutter');
let rowHeight = this.get('currentRowHeight');
let rowMode = this.get('currentRowMode');
let rowCount = this.get('rowCount');
switch (rowMode) {
case 'fixed': {
style.height = dimensionCSS({ unit: rowHeight, span: rowCount, gutter });
style.paddingBottom = '';
break;
}
case 'ratio': {
// rowHeight is width / height
let hGutterShare = colCount === 1 ? 0 : (colCount - 1) / colCount;
let hShare = (1 / colCount) * 100;
let vShare = hShare * (1 / rowHeight);
let vUnit = unitCSS({ share: vShare, gutterShare: hGutterShare, gutter });
style.height = '';
style.paddingBottom = dimensionCSS({ unit: vUnit, span: rowCount, gutter });
break;
}
case 'fit': {
// rowHeight is container height
style.height = '100%';
break;
}
}
return style;
},
// Calculates tile positions
_setTileLayout() {
let tiles = this.orderedTiles();
let layoutInfo = gridLayout(this.get('currentCols'), tiles);
tiles.forEach((tile, i) => tile.set('position', layoutInfo.positions[i]));
this.set('rowCount', layoutInfo.rowCount);
},
// Sorts tiles by their order in the dom
orderedTiles() {
// Convert NodeList to native javascript array, to be able to use indexOf.
let domTiles = Array.prototype.slice.call(this.element.querySelectorAll('md-grid-tile'));
return this.get('tiles').sort((a, b) => {
return domTiles.indexOf(a.get('element')) > domTiles.indexOf(b.get('element')) ? 1 : -1;
});
},
// Parses attribute string and returns hash of media sizes
_extractResponsiveSizes(string, regex = mediaRegex) {
let matches = {};
let match;
while ((match = regex.exec(string))) {
if (match[2]) {
matches[match[2].slice(0, -1)] = match[3];
} else {
matches.base = match[3];
}
}
return matches;
},
// Gets attribute for current media
_getAttributeForMedia(sizes, currentMedia) {
for (let i = 0; i < currentMedia.length; i++) {
if (sizes[currentMedia[i]]) {
return sizes[currentMedia[i]];
}
}
return sizes.base;
},
colsMedia: computed('cols', function() {
let sizes = this._extractResponsiveSizes(this.get('cols'));
if (Object.keys(sizes).length === 0) {
throw new Error('md-grid-list: No valid cols found');
}
return sizes;
}),
currentCols: computed('colsMedia', 'currentMedia.[]', function() {
return this._getAttributeForMedia(this.get('colsMedia'), this.get('currentMedia')) || 1;
}),
gutterMedia: computed('gutter', function() {
return this._extractResponsiveSizes(this.get('gutter'), rowHeightRegex);
}),
currentGutter: computed('gutterMedia', 'currentMedia.[]', function() {
return this._applyDefaultUnit(this._getAttributeForMedia(this.get('gutterMedia'), this.get('currentMedia')) || 1);
}),
rowHeightMedia: computed('rowHeight', function() {
let rowHeights = this._extractResponsiveSizes(this.get('rowHeight'), rowHeightRegex);
if (Object.keys(rowHeights).length === 0) {
throw new Error('md-grid-list: No valid rowHeight found');
}
return rowHeights;
}),
currentRowHeight: computed('rowHeightMedia', 'currentMedia.[]', function() {
let rowHeight = this._getAttributeForMedia(this.get('rowHeightMedia'), this.get('currentMedia'));
// eslint-disable-next-line ember/no-side-effects
this.set('currentRowMode', this._getRowMode(rowHeight));
switch (this._getRowMode(rowHeight)) {
case 'fixed': {
return this._applyDefaultUnit(rowHeight);
}
case 'ratio': {
let whRatio = rowHeight.split(':');
return parseFloat(whRatio[0]) / parseFloat(whRatio[1]);
}
case 'fit': {
return 0;
}
}
}),
_getRowMode(rowHeight) {
if (rowHeight === 'fit') {
return 'fit';
} else if (rowHeight.indexOf(':') !== -1) {
return 'ratio';
} else {
return 'fixed';
}
},
_applyDefaultUnit(val) {
return /\D$/.test(val) ? val : `${val}px`;
}
});